The Nickelworks snare throw with the plastic throw arm.Just a matter of time before it broke.
Wow, I already forgot about those. I never liked them. They always reminded me of the Simplex derailleur I had on my old bicycle....and IT was always breaking, too. But I met Greg Nickels and he's a really nice guy.
The Arbiter Flats kits were ok. They were a "last ditch" attempt to sell Ivor Arbiter's tuning mechanism....which failed to sell on the rather pricey AT line when they came out. Personally, I love my AT kit. The Flats were portable, but there were already a couple of similar kits by other companies on the market and hardly any of them caught on.
Which reminds me of another miserable design by Yamaha...The HipGig kit. It seemed like a good idea, on paper, but, in reality, those kits were heavy and took up every bit as much of a footprint as a regular kit. All the hardware and half the drum!